Inner tube for tires



R. F. CORLES S. INNER TUBE FOR TIRES. PPPPP CATION FILE'D JULY 19, 921.

Pait'ented Sept. 6,1921.

v I a 80" ression within 50- rubberto fold ands lit is eliminated,

Qther objects on advantages of the m- STATES. T-Em m muss 1r r. coamss, or corpses 341m, oaonem.

. I TUBE For.

Tb ll whom it m mom Be it known that I; REUBEN 'Conu'nss,

. a citizen ofthe'Un'ited -Sta tes, residing' at' CollegeParkyinthefcounty of Fulton and State of Georgia, have invented certain new. "i .and useful Improvements in Inner Tubes for Tires', lofwhich the following is a specii'f ifica'tioaj This'invention-relates to inner tubes-for knownfas 'compres s'ionjtubesg;.1 z

'pies sign-see "to-expand an'dcree towa'rdfthefl gpin't of least resistance. [It is't, ereforejnegtube offsub'stantd'all uniforni' thickness" mord rs-that{the egwi time, t ,is'; onl and desirable that to I which. it is subjected; and it will. the-rel fore be obvjous that-a considerableaniount of rubber is used ins fichaitire which "serves no other purpose. than to equalize the come 1nnertube..;

r I It is also well knownfby manufacturers of this type 'of inner'tube' that the tubes can be made only slightly larger than the inside.

36 of the casing in which it is to he usedas the inflation of the inner tube'ha's a'tendency'tiff cause folds in the outer portion of the inner.

- automobile tires and more particularlytothe' the rubber throughout the. h p p manufacture, the tube-is molded with--a cirtube which result insplitting rubber and "causin blow-outs.

An important objectof the present'inven-.

tion is to provide an inner -tube of the cornp'i'e'ssion type wherein only the outer or tread-portion of the tube is formed" relatively thick, and the inner portion relatively-'- thin,imeans being PIOVidOdZtO prevent lateral and circumferential creepingof the inner tube when inflated. a

A "further object of the invention is to form such-a tire in which the tendency of the description;

' a tirp and rim showing the tube applied tiveview ofa portion of the inner tube 'de ated. and j ind1- I p p p A I 'ig'natedasia whole by the referencenumeral 25 be relatively" 119k ona account t h ar-ii.

I y specification 0! Letters w Patented Sept. 6 ,1 9 i v .ap 3neati6mn1eam; 19, mi:- serairoxasazoa vent-ion will be apparent-from the following the. drawings, formin part I this specification andin whic like numer-fM als are employed to desighate like parts throughout,

Figui'e 1 1s a transverse sctional yi'ew 01Cv I thret'o deflated,

-. n Fig.2 -isa' similarview showing thetube mfiat'GCh-l. i I

. mg; 3 is 'a fragmentary sectional p'ersp i Fig. 4 is a similar perspective-view show;

j the. drawings, wherein for; the purpose I I of lllus'tratlon i s'shown' a preferred embodiment ofmy invention, the-numeral 5 d'esig-f W mitestire casing mounted upon a suitable? I casing and rim being of'any well kn'own'o'r preferred type.

y n o mprises an inner tube 'desJ 7. As showm the inner portion 8 of-the tire ls-re'latively thin, being of substantially the 'sa'methiekn ess as the ordinary inner tube now commonly 1n use.- The tube increases.

in thicknessoutwardly, as shown, the tread portion -9be1ng relatively thick. "In its wardly as at ll-to join the side walls 12. It 'will be understood that the above described positions of'the portions of the tire are such whenthe. tire is deflated.

A pair of rows of vacuum cups 13 are arranged cir'cumferentially of the tire on opposite sides of the center thereof and these vacuum cups have their edges provided with small raised beads life! a purpose to be described. As sho wnin Fig. 1, when the 05' tire is in the deflated position, there is an annular'space 15 formed between the inner tube and the casing, andtli'e vacuum cups are arranged so that when the/inner tube is in the position shown, only the head 14 separates the vacuum cups from the. annular space betweenthe tire casing and the tube.

"As previously stated, .the tread portion of .the inner tube is relativelythick'a'nd1 this. own-' thickness decreases outwardly am wardly so that as shown, the thickness of the, rubber at the outer' and lower portions .ot the vacuum cups is much less than at the up er and inner portions of the cups.

. he operationof my device is as 'follows&

The IlXIfiMlOIIgOf. the tire is accomplished in the usual manner by a valve (notshown).

the vacuum cups, and 'as the. air I pressure 2 increases within, theftire itwill be-obvious As the pressureincreases .within the tire the v -.tread portion' 9 hf the tube willbe gradually forced-(outwardly againstjgth'e easing As shown' in Fig. '1 the distance around the in ner face.v of, the, casingbetween the!" upper and inner ends-"of the yacmfm -eups is sub stantially less than the idistance around the due I inner tube.

size, and arrangement of" that these thin i'portions yvill be forced out,

wardly exhaust ng.-.;airr 7 from, the vacuum cups, the air being permitted ,to freely capef from :the upper portions of the: cups joined claims.

Having described my invention, I claim: 1. An inner tube for tires, having its tread portion provided with a groove and vacuum cups arranged on opposite sides of. said groove.

\tively thick tread portion and a relatively thin inner portion, said tube being n-ovided on opposite sides of the center with spaced rows-of vacuum cups. v

:3. An inner tube for tires,.having a relativel thick tread portion forming a-circum erential groove, said tube being pro- ;vided' on. opposite sides-of said groove with rows of vacuum cups.

ferentiaI;groove-and a relatively thin inner vportion, said tube being, provided on oppo-- sorted to without departing from the spirit of the invention .or thescope 'of the sub- 2'. An inner tube for tires, having a rela- :4. An inner tube for tires, having a rela-. .tively-thick tread portion forming a circumsite sides of sa-idgrkxive with rows of vacuum ,cu shavingraised edges, said tube being thinner-at their outer portions than at the inner 'portions of said vacuum cups.

Ina device of the character described,

outer face -of'the tread fportiontof the 'innerha casing havingg' a'smoothinner surface; and

an inflatable tube. mounted 'in said casing, i

be obvious that'ivhen e e' trea'dlp'ortion of high i eompressiom yvhereby a l punctures against the i and also' prevent-the tread pointof least resistance as would normally If is W1 6 m et my invention herefwit is to be takenas aprqf same, and that various? niler face of the casing and effectually prel ent'ithe tube from creeping 'lon 'tudina 1y I rub rfrom expan-dingalaterally to seek the fi e Zgraduated thickness of the goin and deserilxxl.

example of the e 'e e-s p ear; ogre-- .jsaid tube bcingrelativcly thin at its inner *portionandahaving a relatively thick tread portion forming a circumferential groove wh'ereb a space is formed between said casing an said-tube when the latter is deflated, said tubejbeing provided on opposite sides 1 of-said 'groove witnmwsof vacuum cups having raised edges,;saidtube being relatively tllinat the outer. portions and relacups, said tube being; adapted a monia casing adjacent the inner edges of "said vacuurn' cups. f i I In testimony whereof I aiiix my signature in presence of two witnesses. REUBEN F. CORI IESS.

'Witnesses!" NELSON Winnie, v

. PAnn'E. CAS'ILEBURYJJ tiv ely thick at the inner poltions'of saidj, I 

